After days of violent protests against Maduro, Guaido declared himself Venezuela’s interim president Wednesday with the support of many nations around the region.

But the opposition leader faces an uphill battle, as he does not have control over vital state institutions and armed forces have disclaimed him. Military commanders have so far promised to stick with socialist Maduro.

He does, however, have the backing of major Western nations, who are calling Maduro’s presidency unconstitutional and fraudulent. Here is a list of who is backing Maduro and who is supporting Guaido.

The United States is seeking to ensure that Venezuelan oil revenue goes to opposition leader and self-declared interim president Juan Guaido, and to cut off money from increasingly isolated President Nicolas Maduro, a top U.S. official said on Thursday.

Although short on details, the announcement signals that Washington is willing to go beyond traditional diplomatic measures and will seek to drain cash from Maduro’s government, which is already struggling under an unprecedented economic meltdown.

Such a move would significantly strengthen the hand of Guaido, who swore himself in as interim head of state on Wednesday with the support of Washington and nations around the region.